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  • 35.00  (1)
  • Atomabsorption / Atomemission / Massenspektrometrie / Isotopenverdünnung  (1)
  • Springer  (2)
  • Elsevier
  • Molecular Diversity Preservation International
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 54 (1992), S. 404-410 
    ISSN: 1432-0630
    Keywords: 07.65 ; 35.00 ; 42.55 R
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A pump- and probe-beam technique is used for measuring time-resolved excited-state absorption (ESA) and stimulated-emission (SE) spectra of Er3+ doped YAlO3. The Er3+ 4 I 15/2 → 4 F 7/2 transition of the sample is excited at 488 nm by an excimer laser pumped dye laser. The ESA and SE of broadband xenon flashlamp light is monitored between 300 and 860 nm by an optical multichannel analyzer (OMA). The analysis of the experimental results provides information on the effective cross sections σESA and σSE originating from several levels and on the populations of these levels. To our knowledge this represents the first detailed investigation of time-resolved ESA and SE over a broad spectral range in rare-earth doped materials.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 41-43 
    ISSN: 1618-2650
    Keywords: Best. von Kalium in Feldspat ; Atomabsorption / Atomemission / Massenspektrometrie / Isotopenverdünnung ; Vergleich
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden vergleichende Bestimmungen des Kaliumgehaltes in Feldspäten mit den Methoden Flammen-Atomemissionsspektrometrie mit und ohne Leitelement, Flammen-Atomabsorptionsspektrometrie und massenspektrometrische Isotopenverdünnungsanalyse bei Probeneinwaagen von etwa 50 mg durchgeführt. Die massenspektrometrische Meßtechnik des Kaliums bei thermischer Oberflächenionisation wird beschrieben. Der Kaliumgehalt zweier Kalifeldspäte wird bei Anwendung der verschiedenen Verfahren mit relativen Standardabweichungen von 0,3–1,8% bestimmt.
    Notes: Summary The potassium content in feldspars is determined by the methods of flame atomic emission spectrometry with and without internal standard, flame atomic absorption spectrometry and mass spectrometric isotope dilution analysis with sample weights of about 50 mg. The mass spectrometric measurements of potassium by the thermal ionization technique is described. The potassium content of two potassium feldspars is determined by the different methods with relative standard deviations of 0.3–1.8%.
    Type of Medium: Electronic Resource
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